Imaging Flashcards
7 cards from real JCAHPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Imaging flashcards as text
Which finding on OCT is most associated with vitreomacular traction syndrome?
Answer: Posterior hyaloid attached to macula causing inner retinal distortion
VMT is characterized by the posterior hyaloid remaining attached to the macula and exerting tractional force, distorting inner retinal contour on OCT.
Specular microscopy of the corneal endothelium measures which parameter most directly?
Answer: Endothelial cell density (cells/mm²)
Specular microscopy images and counts corneal endothelial cells, providing cell density (cells/mm²), morphology, and coefficient of variation.
A 'staining' pattern on late-phase fluorescein angiography is best described as:
Answer: Persistent hyperfluorescence without increasing size or intensity
Staining refers to dye pooling in fibrous or scar tissue producing persistent late hyperfluorescence that does not expand, distinguishing it from active leakage.
In optic nerve head imaging with the Heidelberg Retina Tomograph (HRT), the reference plane is set at:
Answer: 350 µm posterior to the temporal retinal surface at the disc margin
The HRT reference plane is positioned 350 µm below the mean retinal surface height at the temporal disc margin to separate the optic cup from the rim.
When a patient has poor fixation during automated perimetry, which reliability index will be most directly elevated?
Answer: Fixation loss rate
Fixation loss rate is measured by presenting stimuli to the blind spot; if the patient responds to these stimuli, it indicates the eye has moved off fixation.
Multicolor imaging using the Spectralis SLO captures three reflectance images using which laser wavelengths simultaneously?
Answer: 488 nm, 515 nm, and 820 nm
Spectralis multicolor uses three simultaneous lasers (488 nm blue, 515 nm green, 820 nm infrared) to produce a composite color image highlighting different retinal layers.
On fluorescein angiography, a retinal artery macroaneurysm typically appears as:
Answer: A focal saccular dilation of a retinal arteriole with early filling and late staining
RAM appears as a focal outpouching of a retinal artery that fills early with fluorescein and may show late staining, often with surrounding exudates and hemorrhage.